Range Rover l322 steering wheel controls

Can anyone help????
I have a 2003 Range Rover l322 vogue se, I have fitted a 2010 Westminster steering wheel and want to know if there is anyway to get the stereo volume buttons and cruise control to work? I realise they run on a different system but has anyone found a way around this?
Many thanks all
James

Hi, could be worth asking In car tech (Google search) they do all sorts of leads & interfaces for steering wheel controls e.g. when head units are changed from factory fitted to after market.